Machine for making index tabs



March 2 ,1926. I 7 3- R. F. TABER I MACHINE FOR MAKING INDEX TABS Filed August 9, 1923 5 Sheets-Sheet 1 March 2 1926.

R. F. TABER MACHINE FOR MAKING INDEX TABS Filed August 9, 1923 5 Sheets-Sheet 2 lave/2Z0);

March 2,1926. 1,575,463

R. F. TABER MACHINE FOR MAKINGWINDEX was Filed Augus t 9, 1925 5 Sheets-She'et 5 1 ,my'm mmimqq g March 2 1926.

R. F. TABER MACHINE FOR MAKING INDEX TABS Filed Augus 9 192:5

March 2 1926. 1,575,463 R. F. TABER MACHINE FOR MAKING INDEX mas Filed August 9, 1923 5 Sheets-Sheet 5 m mm Q N \|W |l\r @N Q m v 1i 9 m R, l x v E I. W ah W m Z 7 mw r ma Q NIQ. .NQ a N w wm Q Na H Patented Mar. 2, 1926.

UNITED STATES PATENT OFFICE.

RALPH F. TABER, OF NORTH TONAWAITDA, NEW YORK, .ASSIGNOR TO BAND COM- IPANY, INQ, OF NORTH TONA'WANDA, NE N YORK, A. CORI ORATION OF NEW YORK.

.IEACIEIINXE; FOR. MAKING INDEX TAB S.

Application filed August 9, 1923.

To all whom it may concern Be it known that I, RALrI-I F. TABnn, a citizen of the United States, residing at North Tonawanda, in the county of Niagara and State of New York, have invented new and useful Improvements in Machines for Making Index Tabs, of which the following is aspecification.

This invention relates to a machine for making index tabs of the type shown in U. S. Letters Patent #1.,199A18, granted to James H. Rand, September 26, 1916.

One of its objects is to provide a novel and eflicient machine of this character, which is reliable in operation and which permits of expeditiously making index tabs with a minimum expenditure of power and labor.

Another object of the invention is to produce a machine which is simple and compact in construction, whose parts are so organized and arranged that they are not liable to get out of order and which does not require the use of skilled workers to operate it.

The invention further consists in various details of construction and arrangement of parts which will be hereinafter described and more particularly pointed out in the appended claims.

In the accompanying drawings:

Figure 1 is a perspective view of an index tab constructed by this machine. Figure 2 is a fragmentary front view of the machine. Figure 3 is a top plan view thereof. Figure 4. is a side elevation of the machine.

Figure 5 is an enlarged longitudinal section on line 5-5, Fig. 3. Figure 6 is an enlarged fragmentary transverse section on line 6-6, Fig. 3. Figure 7 is a horizontal section on line 77, Fig. 6. Figure 8 is a detailed front view of the device for separating the attaching portions of the tab. Figure 9 is an enlarged horizontal section taken in the plane of line 9-9, Fig. 4.. Figure 1.0 is an enlarged vertical longitudinal. section on line 10-10, .Fig- 3. Figure 11 is an enlarged vertical section of the gumming mechanism and associated parts. Figure 12 isa vertical section on line 12-12, Fig. 11.

Figure 13 is a front view of the gumming mechanism. Figure 14: is an enlarged in v-erted perspective view of the female memher of the fabric folding die. Figure 15 is a similar view of the celluloid strip folding Serial No. 656,500.

flexible material 21 such as linen tape or other strong fabric. The attachingstrip is arranged lengthwise within thetransparent strip and its sides are secured directly thereto, the fold of the attaching strip terminating short of the fold of the transparent strip so as to leave the interior of the transparent strip unobstructed above the fold of the attaching strip and forming a pocket 21 for p the reception of an index slip.

In its general organization, this improved machine eomprisesmeans for feeding a flexible tape or strip of fabric and a celluloid strip through the machine, a gumming or cementing device for applying an adhesive to the central portion of the fabric strip, mechanism for folding or doubling the fabric strip and celluloid strip upon them selves in the direction of their length, so that the upper folded portion ofthe fabric strip is contained between the side walls of the celluloid strip, means for applying heat and pressure to the fold and side walls of the celluloid strip for the purpose of properly forming such folds permanently and for reliably securing the fabric strip to the celluloid strip, and a device for separating the side walls of. the fabric strip after the several operations upon the tab'have been completed.

Any suitable means may be employed for supporting the working parts of the machine, that shown in the drawings, by way of example, consisting of a table 22 and a base frame or casing 23 mounted on the upper side of this table. Mounted in suitable bearings below the top of said supporting table is a supply drum or reel 24 u onwhich, the fabric strip 2511s wound. his

fabric strip is threaded upwardly through openings 26, 26 formed in the table top and casing, respectively, and through an opening 27 in a supporting block 28. From the latter this fabric strip is fed between the longitudinal stretches of a pair of endless steel bands or belts 29, 29 which pass at their ends around horizontally disposed front and rear drums or pulleys 30, 31 mounted on corresponding upright shafts 32, 33 suitably journaled in the casing. These steel bands enter peripheral grooves 34: formed in the respective drums, so that they are flush with the adjoining sides of said drums. Mounted in the casing is a horizontal driving shaft 35 arranged transversely of themachine and provided near the opposite ends thereof with worm gears 36, which are in constant mesh with worm wheels 37 mounted on the lower ends of the front pair of drum-shafts 32. The rear set of drums are driven from the front set through the medium of friction wheels 38, 88supported in the peripheral grooves 34 of opposing drums. These friction wheels are mounted in blocks 39, 39 located on opposite sides of the longitudinal stretches of the steel bands, said blocks being connected to transverse guide rods 40. These blocks are capable of moving yieldingly toward and from each other for the purpose of reliably holding the friction rollers in contact with the drums and for this purpose coil springs 41 are applied to the guide rods and are interposed between the opposing ends of said blocks.

The celluloid strip 42 is likewise fed between the longitudinal stretches of the steel bands but before reaching these belts the same is fed and guided thereto between the upper and lower feed rolls 43, 48 suitably mounted in bearings formed in the upper side of the casing. Motion is transmitted to the lower roll from the driving shaft 35 by means of a worm gear 44 mounted on the latter and meshing with a worm wheel L5 carried by the lower end of an upright shaft 46. Mounted on the upper end of the latter is a worm gear 47 meshing with a corresponding worm wheel -18 mounted on the lower feed-roll shaft 43. For the purpose of guiding the celluloid strip between these rollers a suitable supporting plate 49 is disposed in a forwardly inclined position on the casing and is provided at its opposite sides with guide bars 50.

The means for gumming or cementing the central portion of the fabric strip, which operation is effected before the strip is fed between the bands 29, 29, are preferably constructed as follows:

51 indicates a well or container for the glue or other suitable adhesive which is mounted on a suitable bracket 52 attached to the supporting table 22 and located in rear of the fabric supply reel 24. In its rear face this container is provided with a guide-way 58 of substantially the same width the fabric strip and serves to guide the latter as it passes from the supply reel to the folding mechanism. In its upper portion the containe-r is provided with a chamber 54 for the cement or glue, the same being connected by a hose 55 with a suitable source of sup ply. That shown in the drawings, particularly Fig.2, consists of an open ended holder 56 secured to the supporting table 22 and to which the upper end of said hose is connected. Removably mounted in an inverted position in this holder is a jar 57 for the glue having a closure 58 provided with a discharge opening 59. \Vhen the depth of the glue in the holder is on a level with the lower end of said discharge opening, a liquid seal is formed. By this construction, an automatically controlled gravity-feed for the glue is provided, The container 51 is provided at its rear side and within its guideway 53 with a discharge passage 60 through which the glue passes preparatory to being applied in a thin fihn on the opposing front side of the fabric strip. The dimensions of this discharge openingare such as to provide the fabric strip with a glue-d portion 61 which covers only its central part. For the purpose of regulating the amount or the thickness of the cement film on the fabric strip, a gage bar 62 is provided which is adjustable in said container opening toward and from the fabric strip. This adjustment of the gage bar is effected by means ofa horizontal adjusting screw 63 held against endwise movement in the front of the con tainer while its threaded portion engages a threaded bore 6 t in said gage bar. If desired a locking screw 65 may be provided for reliably holding the gage bar in a set position.

For the purpose of holding the fabric strip firmly in the guideway of the gunnning device a spring pressed follower (i6 is pro vided which is mounted on a horizontal stem 7 guided in an opening 68 formed in an upright extension 69 of the bracket 52. A coil spring 70 is applied to this stem and interposed between the follower and the opposing wall of said extension. By this construction, the fabric strip is held firmly and taut between the base of the guideway and the follower to permit of applying the central portion of the strip with a uniform layer or coating of the cement v The mechanism for folding or doubling the fabric strip lengthwise upon itself is pref rably constructed as follows:

Mounted on the supporting block 28 im mediately in rear of its opening 27 is a malefolding die 72 whose upper side is convex, the degree of curvature thereof gradually increasing in sharpness from its front end to the rear end thereof and the height of all ing 28 is a companion female die memberor plate 73 which is provided at its rear end with a notch or recess 74 into which the corresponding or reduced end of the male die is adapted to extend. The forked ends 75, formed by the notch in the female die plate, overlie the adjoining sides of the male-die member 72, co-operating therewith to firmly guide and hold the marginal side edges of the fabric strip properly in engagement with said male die. 'These folding dies are located immediately in front of and at the intersection of the front set of drums 30, 30, so that when the fabric strip is folded or doubled, it immediately passes between the bands 29, 29 which retain the strip in its folded position after leaving said dies.

Preferably mounted directly over the fabric forming dies 72, 73 and immediately in rear of the celluloid feed rolls is a die member 76 for folding or doubling the celluloid strip 42 lengthwise upon itself before it passes between the bands 29, 29. Tothis end said die member is provided on its underside with a groove or recess 77 which preferably extends from end to end thereof and is substantially the width of the celluloid strip at its front end and gradually tapers or decreases in width toward its rear end, the width of said groove at its rear end being comparatively narrow, as shown in Fig. 18. The depth of this groove increases from its front end to its rear end, the depth at the rear end being substantially equal to the height of the celluloid strip in its folded state. As shown in Figs. 5, 16 and 18, the fabric and celluloid folding dies are so dis posed that the folds in the respective strips are practically produced simultaneously, the fold in the fabric strip being located between the side walls of the celluloid strip and below the fold thereof, so that at this stage of the operation, the strips are in their correct relative positions. The celluloid strip-forming die 7 6 may be remo'vably held in place by a suitable clamping screw 7 6.

In order to permanently maintain the fold in the celluloid strip after being doubled upon itself in passing through the forming die 7 6, it is necessary to subject the folded portion of the strip to heat and The preferred means for thus heating the fold of the celluloid strip consists of an electric heater consisting of a coil of wire 78 wound around a metallic core or heating iron 7 9 and having its ends connected to a suitable source of electricity. Said heating iron, as shown in Figs. 3 and 5, is mounted on avertically swinging yoke 80 pivoted at 81 to an adjacent fixed part tion, the heat of the coils of the machine. The heating coil may be wrapped or enclosed within a suitable insulated covering 82, such as asbestos. The heating iron is located directly in rear of the folding die 76 and its bottom edge is provided with a substantially V-shaped notch or recess 83 which is adapted to normally overlie and contact with the fold of the celluloid strip as it passes rearwardly from said die. To relieve the folded celluloid strip of the weight of this heater-and its attaching yoke, the core 7 9 is provided with a heel 84 which is adapted to engage the upper rear side of the die 76 when in its operative position, as shown in Fig. 5. After being subjected to this heat from contact with the core of the heater the celluloid strip passes between the belts 29, 29 where it is subjected to the pressurethereof.

In addition to being heated at its fold the side walls of the celluloid strip are also heated while in contact with the longitudinal stretches of the belts 29, 29, so as to cause the said walls to be permanently secured to the gummed portion of the fabric strip, these belts being preferably heated from the front drums 30, 30. For this purpose, as shown in Fig. 6, these drums are provided near their peripheries with annular grooves 85 in which are arranged heat ing or resistance coils 86 connected to a suitable source of electrical energy. In the eX-- ample shown in the drawings, one of the terminals of each coil is connected by a wire 87 with the corresponding shaft 32 of the respective drum while the other terminal is connected by a wire 88 to a conductor ring 89 rotatable with said drum.v Theshaft 32 and said conduct-or ring are insulated from one another by a suitable bushing 90. Dis posed above each drunr30 and radiating from the axis thereof is a fixed horizontal arm 91 which is provided with two terminal posts or brushes 92, 93 one being adapted to contact with the respective drum shaft and the other with the end of the conductor ring 89, as shown in Figs. 5 and 7. These term nal posts are included in an electric c1rcu1t having a suitable switch (not shown) for controlling the same. By this construc- 86 is transmitted to the rims of the drums 30, 30 and thence to the steel belts 29, 29. From these belts tile heat is then transmitted to the celluloid s rip.

Interposed between the front and rear sets of drums 30, 31 means are provided for subjecting the side walls of the celluloid strip and the attaching folded portion of the fabric strip to the necessary pressure for firmly securing such strips permanently -together. As shown in Figs. 3 and 19, these means preferably comprise a series of pressure rollers 94 located on opposite sides of the belts 29, 29 and yieldingly held in frictional contact therewith. For this purpose these rollers are mounted in oppositely-facing longitudinal channel bars 95 supported upon ledges 90 mounted on suitable upright posts 97. Spring clamps 98 are provided whose lower ends engagethe outer sides of the roller supporting bars and tend constantly to move such bars toward the'side of the belts 29. i

After passing between the belts 29, 29 the fabric strip is presented to a slitting or separating knife or'blade' 99 which functions to separate the projecting lower ends of the fabric strip from each other; Arrange-d on opposite sides of this blade and spaced therefrom are a pair of uprightwalls 100 between which and the blade the opposite sides of the tab pass while the lower end of the tab is being o11 erated upon by said blade.

Located beyond the slitting device isa pair of feed rollers 101, 101 which serve to feed and guioe the tab-strip to a point where it is cut into proper lengths for use. These feed rollers may bedriven by. belts 102 connected to the hubs of the rear drums 31.

In order to remove any excessglue from the operative sides of the belts 29, 29, scrap ers 103 are provided which n' ay be located beyond the point of intersection of the drums 31, as shown in 3.

For the purpose of. adjusting the front set of drums 30 toward and from each other and thereby regulate the pressure between the belts 29, 29, each of said drums is provided with an eccentric sleeve or bushing 10'1 which is loosely mounted on theshaft 82 of the respective drum, the exterior portion of this eccentric engaging the circular bore of a neck 105 projecting upwardly from the top of the gear casing 23 andthrough which said shaft extends. At its upper eno each eccentric is provided with an annular flange 106 which rests upon the upper end of said casing-neck and is provided with a suitable handle 107 for turning it. Said e centric is held in a set position by means of a suitable locking device including a rod 108 whose inner end engages a threaded opening 109 in the neck 105 and abuts a ainst the face of the eccentric, as shown in l 6.. By this construction and arrangement, when it is desired to move the drums 30 toward and from each other the rods 108 are looser ed so as to perniihthe rotation of the eccentric sleeves by means of their handles 10?. V

The operation of the machine is as follows The fabric strip is threaded through he gunnning device, openings 26, 26, 27 in the table 22, gear casing 23 and supporting block 28, respectively, andthence between the contiguous faces of the folding dies 72, 78 to the feeding belts 29, 29, the glued-central part of the strip being exposed. 'atthe top and adjoining sides of the fold thereof. The celluloid strip 42 is then fed between the feed rolls 5L3,- 43 to its folding die 76. Upon leaving the latter in its doubled or folded condition uthe lower portions of the side walls thereof overlap or straddle the corresponding glued'portion of the fabric strip adjacent to its fold. Before passing between thecontiguous faces of the belts 29, 29 the fold of the celluloid strip contacts with the heating iron 79 which heats such fold sufficiently to enable it to be properly and permanently creased when subjected to the pressure of thedrums 3 0 and said belts. \Vhen the fabric and celluloid strips have been properlythreaded or started through the machine motion is transmitted to the driving shaft 35 after which the operations are effected automatically as the strips are fed lengthwise through the machine. \Vhile passing between the heated belts and the pressure rollers 94:, the two parts of the strip of tabbing are firmly united by the combined action of heat and pressure. After being discharged from between the belts 29, 29, the tahbing isguir led between the feed rollcrs 101 and then presented to a suitable cutter mechanism, (not shown) where it is cut up into suitable lengths'for use.

i In making index tabs of ditferentsizes it is only necessary to replace the. celluloid folding die for another of the size desired, inasmuch as it is this particular die which determines the size of the tab as to the height of the pocket for the removable index slip.

index tabs may be modified in various respects within "the scope of the appended means for folding said strips lengthwise upon themselves in the same direction with the fold of one strip contained between the side walls of the other strip.

2. A machine for making index-tabs of the character described, comprising a sup porting frame, 1neans for guiding the tabforining strips through the, machine, means for folding said strips lengthwise upon themselves in the same direction with the fold of one strip contained between the side walls of the other strip,'and means for joining saidstrips to each other.

3. A machine for making index-tabs of the character described, comprising a supporting frame, means for guiding the tab forming strips throu h the machine, ineaps for applying an 'fidllESiVE to one of said I is obvious that this machine for making strips, and means for folding said strips lengthwise upon themselveswith the fold of one strip Contained between the side walls of the other strip.

A. A machinefor making'index-tabsof the diameter described, comprising a supporting frame, means for guiding the tab-- forming strips through the machine, means for foldin said stri s len thwise uoon themr: a l

selves with the fold of one strip contained between the side walls of the other strip, means for applying an adhesive to one of said strips, and means for subjecting the at-' taching portions of said strips to pressure.

5. A machine for making index-tabs of the character described, comprising a supporting frame, means for guiding the tab forming strips through the machine, means strips, means for folding said strips length wise upon themselves in co operative rela tion with each other, and a pair of opposing 'endless belts between which the strips pass after beingdischarged from said folding means.

7. A machine for making index-tabs of the character described, comprising a supporting frame, means for guiding the tab forming strips through the machine, means for applying an adhesive to one of said strips, means for folding the strips lengthwise upon themselves in co-operative relation with each other, means for subjecting such folded strips to pressure, and means for heating said pressure-subjecting means.

8. A machine for making index-tabs of the character described, comprising'a supporting frame, means for gulding the tabforming strips through the machine, means for applying an adhesive to one of said strips, means forfolding said strips lengthwise upon themselves in cooperative relation with each other, and a pair of revolving heating drums arranged in advance of said folding means between which the strips are adapted to pass.

9. A machine for making index-tabs of the character described, comprising a supporting frame, means for guiding a tabforming strip through the machine, means for folding said strip lengthwise upon itself, and means for subjecting the fold of said strip to heat.

10. A machine for making index-tabs of the character described, comprising a supporting frame, means for guiding ,tab-forming strips through the machine, means for folding said strips lengthwise upon themselves in co-operative relation with each other, and a heating device arranged in advance of said folding means and adapted to engage the fold of one of said strips.

11. A machine for making index-tabs of the characterdescribed, comprising a supporting frame, means for guiding the tabforming strips through the machine, means for folding said strips lengthwise upon themselves in co-operative relation with each other, and a vertically-swinging heat ing device mounted on said frame and arranged to engage the fold of one ofsaid. strips.

12. A machine for making index-tabs of the character described,comprising a supporting frame, means for guiding the tabforming strips through the machine, means for folding said strips lengthwise upon themselves in co-operative relation with each other, means for joining said strips together, and a heating device arranged between said folding means and said strip-joining means and adapted for engagement with the fold of one of said strips. g

13. A machine for making index-tabs of the characterdescribed, comprising a-'supporting frame, means for guiding'the 'tabform-ing strips through the machine, means for applyingv an adhesive to one of said strips, means forfoldhig the strips lengthwise upon themselves in co-operative relation with each other, a pair of opposing endless bands between which the folded strips pass after leaving said folding means,

and a heating device interposed betweensaid folding means and the front ends of said belts.

14. A machine for making index-tabs of the character descrlbed, comprising a supporting frame, means for guiding the tabformmg strips through the machine, means means located between said front and rear sets of drums for pressing the operative stretches of said belts firmly together.

15. A machine for making index-tabs of the character described, comprising a supporting frame, means for guiding the tabforming strips through the machine, means for folding said strips lengthwise upon themselves in co-operative relation with each other, front and rear sets of opposing drums arranged in advance of said folding means,

endless belts engaging said drums, said tabforming strips passing between the opposing longitudinal stretches of said'belts, and pressure rollers arranged on opposite sides of the operative stretches of said belt. v

16. A machine formaking index-tabs of the character described, comprising a supporting frame, means for guiding the tabforming strips through the machine, means for folding said strips lengthwise upon themselves in co-oper-ative relation with each other, front and rear setsof opposing drums arranged in advance of said folding means, endless belts engaging said drums, said tabforming strips passing between the opposing longitudinal stretches of said belts, pressure rollers arranged on opposite sides of the operative stretches of said belts, and means for constantly urging said rollers toward one another transversely of the belts.

17 A machine for making index-tabs of the character described, comprisinga supporting frame, means for guiding the tabforming strips through the machine, and means for folding said strips lengthwise upon themselves with the fold of one strip contained between the side walls of the other strip, said means including superimposed die members for folding said strips simultaneously, the opposing faces of said die members being in spaced relation to produce a pocket between the resulting folds "of the tab-forming strips. I v r 18. A mach'ne for making index-tabs of the character described, comprising a supporting frame, means for guiding the tabforming strips through the machine, and means for folding said strips lengthwise upon themselves in co-operative relation with each other, said means including a substantially convex folding die, a notched plate engaging the front end of the latter, and a concave folding die surmounting said firstnamed folding die and said plate. I

19. A machine for making index-tabs of the character described, comprising a supporting frame, means for guiding the tabforming strips through the machine, and means for folding said Istrips lengthwise upon themselves in co-operative relation with each other, said folding means includ ing a folding die whose upper side is convex and gradually increasing in curvature from its front end to the rear end thereof, a companion die member partially engaging said first-named die member and between which and the. latter one of said tab-forming strips is adapted to pass, and a third die member surmounting said first and second die member and provided with a cavity for receiving the other tab-forming strip, said cavity tapering from the front end to the rear end of its die.

20. A machine for making index-tabs "0f the character described, comprising a supporting frame, means for guiding the tab- .forming strips through the machine, comapplying an adhesive to one of said strips forattaching the other strip thereto, including a container for the adhesive having a discharge passage therein over which the first-named strip is adapted to pass.

22. A machine for making index-tabs of the character described, comprising a supporting frame, guiding means for the tablorming strips, means for folding said strips lengthwise upon themselves in co-operative relation with each other, and means for applying an adhesive to one of said strips for attaching thefother strip thereto, including an adhesive container having a guideway in one of its walls for the strip to be treated and a discharge passage for the adhesive opening into said guideway.

23. A machme for making index-tabs of the character described, comprising a su t porting frame, guiding means for the ta forming strips, means for folding said strips lengthwise upon themselves in co-operative relation with each other, and means for applying an adhesive "to one of said strips for attaching the other strip thereto, including an adhesive container having a guideway in one of its walls for the strip to be treated and a discharge passage for the adhesive opening into said guideway, and means for regulating the discharge of they adhesive through said passage. y

g 24;. A machine for making index-tabs of the character described, comprising a supporting frame, guiding means for the tabforming strips, means for folding said strips lengthwise upon themselves in co-operative relation with each other, and means for ap plying an adhesive to one of said strips for attachingthe other strip thereto, including an adhesive container having a guideway in one of its walls for thestrip to be treated and a discharge passage for the adhesive opening into said guidew-ay, and an adj ustable gage bar mounted in said container for regulating the discharge of the adhesive through its passage.

7 25. A machine for making index-tabs of the character described, comprising a supporting frame, guiding means for the tabforming strips, means for folding said strips lengthwise upon themselves in 00- operative relation with each other, and means for applying an adhesive to one of said strips for attaching the other strip thereto, including an adhesive container having a guideway in one of its walls for the strip to be treated and a discharge passage for the adhesive opening into said guideway, and means for retaining the treated strip firmly in said guideway.

52$. A machine for making index-tabs of the character described, comprising a supporting frame, guiding means for the tabforming strips, means for folding said strips lengthwise upon themselves in co-operative relation with each other, and means for applying an adhesive to one of said strips for attaching the other strip thereto, including an adhesive container having a guideway in one of its walls for the strip to be treated and a discharge passage for the adhesive opening into said guideway, and a springpressed follower block for holding the treated strip firmly in its guideway while the adhesive is being applied thereto.

27. A machine for making index-tabs of the character described, comprising a supporting frame, means for folding the tabi'orming strips lengthwise upon themselves 1n co-operative relation with each other, means for applying an adhesive to one of said strips for attaching the other strip thereto, a pair of opposing drums between which said strips pass after being folded, and

means for adjusting said drums toward and from each other.

28. A machine for making index-tabs of the character described, comprising a supporting frame, means for folding the tabforming strips lengthwise upon themselves in co-operative relation with each other, means for applying an adhesive to one of said strips for attaching the other strip thereto, means for subjecting the attaching portions of said strips to pressure, and a device for separating the opposing side walls of the strip bearing the adhesive.

29. A machine for making index-tabs of the character described, comprising a supporting frame, folding means for doubling a continuous strip of fabric and a continuous strip of celluloid lengthwise upon themselves so as to form a pocket for an index slip between the folded portions of the two strips, means for applying an adhesive to the outer side of the fabric strip preparatory to being folded, a pair of parallel bands between which the folded strips are compressed and united, a heating device for heating the folded edge of the celluloid strip upon emerging from said folding means and preparatory to being compressed by said bands, and a blade for separating the free side portions of the united strips upon emerging from said bands.

RALPH F. TABER 

